Steam-boiler furnace



(No Model.)

- 0. I. HALL.

STEAM BDILER FURNACE.

No. 257,000. Patented Apr. 25,1882;

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GOFRAN I. HALL, OF SANFRANOISOO, CALIFORNIA.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 257,000, dated April 25, 1882. Application filed August 5, 1881. (No model.)

To all whom it may concern:

Be it known that I, OOFRAN I. HALL, of San Francisco, California, have invented an Improvement in Steam-Boiler Furnaces, of which the following is a specification.

My invention relates to boilers of the locomotive type which have either deflecting firetiles within the furnace, supported on pipes through which the water of the boiler is circulated,orhavedeflectingwater-backs,through which the water circulates, connected by pipes to the sides of the furnace, as herein described.

The object of the invention is to facilitate the introduction of the said tiles and their supporting-pipes or the water-backs into and their removal from the furnace, as well as to provide a more secure and perfect means of connecting the supporting and circulating pipes or water-backs to the walls of the furnace.

The invention consists in dividing the waterback or the tile-supporting pipes, as the case may be, into two sections, each section connecting above and below with the near side of the furnace by running a pipe through short tubes passing through the walls of the furnace and connecting said pipes with the outside of the furnace, so that at any time when steam is down the pipes or water-back may be disconnected from the outside and withdrawn for cleaning or repairs bypassing them through the fuel-door.

In accompanying drawings, Figure l is a vertical transverse section through a locomotive-boiler, giving a full front view of the tilesupporting pipes. Fig. 2 is a vertical longitudinal section of furnace end of a locomotiveboiler, giving an edge view of the pipes with the fire-tiles resting upon them. Fig. 3 is a sectional plan of same boiler, showing plan of the pipes. Fig. at is a'detail plan of that portion, of the pipes which illustrates the manner of passing through side of furnace and connecting with the outside. Fig. 5 shows a perspective view of a water-back which takes the place of the tiles and supporting-pipes. Fig. 6 is a view showing water-back in position.

In all the figures the same letters of reference indicate the same parts.

A is the cylinder part of a locomotive-boiler.

O are the grates upon which E is the Bis the furnace. the fuel rests. D D are the tubes. fuel-doorway. F is the ash-pit doorway. G is the water-space all around the furnace. H H are the deflecting fire-tiles. I I are the circulating-pipes which support them. the short tubes, which are securely calked in sides offurnace and allow the pipes I I to pass through.

Each circulating-pipe here shown is composed of twenty seven pieces, as follows: twelve short pieces of pipe or nipples, six elbows, four Ts, two couplings, and three long pieces of pipe. The couplings may be either union-couplings or simple running sockets; or flanges may be used to make the joining, as preferred.

The size of the doorway for the fuel will generally admit of the pipes being passed in and out. If not, they will pass out of ash-pit opening after removal of grate-bars.

The deflecting fire-tiles, which I show only in Fig. 2, may be in two or more pieces, and may be arranged as to their position in furnace to suit various conditions, though generallyslantiug,asshown. Thewater-back shown in Fig. 5 takes the place of all the pipes inside the furnace, and the fire-tiles, too; but the connection through walls and to outside the furnace will bethe same in both cases.

By this arrangement I am enabled to take the whole apparatus down and replace it in a few minutes without operating to screw up and unscrew joints within the furnace, and the connection with the furnace being removed from the fire, it is not liable to burn out and leak; also, if the doorway for fuel be of average size, there need be no disturbance of the grate-bars when removing the pipes or waterback, heretofore found necessary when the pipes or water-back is made in one piece.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a steam-boiler furnace, the circulatingpipes I or water-back, Figs. 5 and 6, when connected with said furnace in four places by continuing all four ends of the pipes, or the ends of pipes correspondingly projected from water-back through the tubes J, set in waterwalls G of furnace, when said pipes connect JJare- 5 for the purpose herein described.

above and below in the water-space of boiler, in two parts, each part being connected with so as to maintain a water-circulation between the next adjacent water-wall G of furnace, as each side of furnace and the pipes I or waterand for the purpose described.

back, as the case may be, substantially as and OOFRAN I. HALL.

Vituesses: 2. In a steam-boiler furnace, the circulatingpipes I 01 water-back, Fig. 5, when divided WM. R. BAILEY, GEORGE PARDY. 

